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SubjectRe: [RFC] 2.5.8 sort kernel tables
On Thu, Apr 18, 2002 at 03:20:17PM -0500, Oliver Xymoron wrote:
> On Thu, 18 Apr 2002, William Lee Irwin III wrote:

>> On Thu, Apr 18, 2002 at 07:46:26PM +1000, Keith Owens wrote:

>>> The use of __init and __exit sections breaks the assumption that
>>> tables such as __ex_table are sorted, it has already broken the
>>> dbe table in mips on 2.5. This patch against 2.5.8 adds a generic
>>> sort routine and sorts the i386 exception table. This sorting
>>> needs to be extended to several other tables, to all
>>> architectures, to modutils (insmod loads some of these tables for
>>> modules) and back ported to 2.4. Before I spend the rest of the
>>> time, any objections?

>> It doesn't have to be an O(n lg(n)) method but could you use
>> something besides bubblesort? Insertion sort, selection sort,
>> etc. are just as easy and they don't have the horrific stigma of
>> being "the worst sorting algorithm ever" etc.

> Combsort is a trivial modification of bubblesort that's O(n log(n)).

> http://cs.clackamas.cc.or.us/molatore/cs260Spr01/combsort.htm

> Though we should probably just stick a simple qsort in the library
> somewhere.

but isn't qsort's worst case behaviour for an already sorted list? i
cant remember how bad it is but i thought it was like O(n^2) for worst
case, ie just as bad as bubble sort..

matt
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